| http://www.w3.org/ns/prov#value | - Referring to the drawings, FIG. 1 is a front elevation of a multifocal lens which has three viewing zones which are a distance vision zone 1 of constant dioptric power, a near vision zone 2 also of constant dioptric power and having a power value greater than the distance vision zone 1, and an intermediate zone 3 of progressively increasing power.
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